C1ARCH

Question 1

A curved structure for spanning an opening, designed to support a vertical load primarily by axial compression.

Answer 1

Arch

Question 2

An arch constructed of individual stone or brick voussoirs.

Answer 2

Masonry arch

Question 3

Any of the wedge-shaped units in a masonry arch or vault, having side cut converting at one of the arch centers.

Answer 3

Voussoir

Question 4

The first voussoir resting on the impost of an arch.

Answer 4

Springer

Question 5

The highest part or point of a convex construction, as an arch vault or roadway.

Answer 5

Keystone

Question 6

Either side of an arch curving down from the crown to the impost.

Answer 6

Haunch

Question 7

The uppermost part of an abutment,often in the form of a block,capital or molding from which an arch springs.

Answer 7

Impost

Question 8

Any of several concentric rings of masonry forming an arch.esp. when each projects beyond the one below.

Answer 8

Order

Question 9

An archway having sides or jams not at right angles with the face of its abutments.

Answer 9

Skew arch

Question 10

The Wedge shaped often embellished voussoir at the crown of an arch, serving to lock other voussoirs in place.

Answer 10

Keystone

Question 11

The exterior curve, surface or boundary of the visible face of an arch.also called back.

Answer 11

Extra-dos

Question 12

A decorative molding or band on the face of an arch following the curve of the intra-dos.

Answer 12

Archivolt

Question 13

The inner curve or surface of an arch forming the concave underside.

Answer 13

Intra-dos

Question 14

The height of an arch from the springing line to thr highest point of Intra-dos.

Answer 14

Rise

Question 15

The point at which an arch, vault or dome rises from its support.

Answer 15

Spring/ Springing

Question 16

The Triangular-shaped, Sometimes ornamented area between the extrados of two adjoining arches, or between the left or right extrados of an arch and the rectangular framework surrounding it.

Answer 16

Spandrel/ Spandril

Question 17

A crosspiece connecting the ribs in a centering.

Answer 17

Lag/ Bolster

Question 18

A temporary framework for supporting a masonry arch or vault during construction until the work can support itself.

Answer 18

Centering

Question 19

A board used as centering for a flat arch, slightly crowned to allow setting of the arch.

Answer 19

Camber piece/ camber slip

Question 20

A arch shaped to develope only axial compression under a given loading. This shape may be found by inverting the funicular shape for a cable carrying a similar loading pattern.

Answer 20

Funicular arch (is subjected to bending is loading pattern changes)
Inverted Catenary- an arch carrying a vertical load uniformly distributed along the length of the arch axis.
The Parabola-an arch carrying a vertical load uniformly distributed over its horizontal projection.

Question 21

The manner in which an arch transforms the vertical forces of a supported load into inclined components and transmit them to abutments on either side of archway.

Answer 21

Arch Action

Question 22

The median line of an arched structure.

Answer 22

Arch axis.

Question 23

The set of resultants of thrust and weight each part of an arch imposes on the next lower one.

Answer 23

Line of thrust ( For bending to be eliminated throughout an arch, the line of thrust must coincide with the arch axis.)

Question 24

The outward force or pressure exerted by one part of a structure against another.

Answer 24

Thrust

Question 25

The thrust of an arched structure on its abutments, proportion to the total load and span and inversely proportional to the rise.

Answer 25

Drift

Question 26

An arched structure of timber, steel or reinforced concrete, constructed as a rigid body capable of carrying bending stresses.

Answer 26

Rigid arch

Question 27

A fixed frame structure having a arched form.

Answer 27

Fixed arch

Question 28

A two hinged frame structure having an arched form.

Answer 28

Two-hinged arch

Question 29

A three hinged frame structure having an arched form.

Answer 29

Three-hinged arch.

Question 30

The part of a structure receiving and supporting the thrust of an arch,vault or strut.

Answer 30

Abutment

Question 31

An iron or steel rod serving as an structural tie, esp. one keeping the lower ends of an arch or frame from spreading.

Answer 31

Tie road

Question 32

An arch having a horizontal intrados with vaoussoirs radiating from a center below, often built with a slight camber to allow for settling.

Answer 32

Flat arch/ Jack arch

Question 33

A flat arch having vaussoirs inclined to the same angle on each side of the center.

Answer 33

French arch.

Question 34

A primitive from of an arch consisting of two stones laid diagonally to support each other over an opening.

Answer 34

Triangular arch

Question 35

A false arch constructed by corbeling courses from each side of an opening until they meet at a midpoint where a capstone is laid to complete the work. The stepped reveals may be smoothed, but no arch action is effected.

Answer 35

Corbel arch

Question 36

An arch having a continuously curved intrados, esp. a semicircular one.

Answer 36

Round arch

Question 37

An arch having a semi circular intrados.

Answer 37

Roman arch

Question 38

An arch struck from one or more centers below the springing line.

Answer 38

Segmented arch

Question 39

A stone or course of masonry having a sloping face against which the end of a segmental arch restes.

Answer 39

Skewback

Question 40

An arch having one impost higher than the other.

Answer 40

Rampant arch

Question 41

An arch resting on imposts treated as downward continuations of the archivolt.

Answer 41

Stilted arch

Question 42

A round arch resting on two large corbels with curved faces.

Answer 42

Bell arch

Question 43

An arch having an itrados that widen above the springing before narrowing to a rounded crown.

Answer 43

Horse shoe arch / Moorish arch

Question 44

An arch having a cusped intrados with three round or pointed foils.

Answer 44

Trefoil arch

Question 45

A three-centered arch having a crown with a radius much greater than that of the outer pair of curves.

Answer 45

Basket-handled arch/ Anse de panier

Question 46

An arch having pointed crown.

Answer 46

Pointed arch

Question 47

A pointed arch having two centers and radius equal to the span.

Answer 47

Equilateral arch

Question 48

A pointed arch having two centers and radius greater than the span.

Answer 48

Lancet Arch

Question 49

A pointed arch having two centers and radius less than the span.

Answer 49

Drop arch

Question 50

An arch having rise less than half the span.

Answer 50

Surbased arch

Question 51

A pointed arch each haunch of which is a double curve with concave side uppermost.

Answer 51

Ogee arch

Question 52

A four centered arch having an inner pair of curves with a radius much greater than that of the outer pair.

Answer 52

Tudor arch